315792

Appears in sequences

• Pentagonal numbers > 0 which are not the difference of two other pentagonal numbers > 0.at n=23A135769
• Pentagonal numbers > 0 which are not the difference of two larger pentagonal numbers.at n=34A136113
• Irregular table read by rows: n-th row lists the 16 n-gonal numbers of a 4 X 4 magic square with the smallest magic sum, and the sum of the first two terms of each row is as small as it is possible.at n=39A271711