...36,49,64, patrate perfecte - se aduna numere impare consecutive (1,3,5,7...)
...28,39,52, se aduna numere impare consecutive (1,3,5,7...)
...26,37,50, se aduna numere impare consecutive (1,3,5,7...)
...35,48,63, se aduna numere impare consecutive (1,3,5,7...)