137751

Appears in sequences

• a(n) is the genus of the modular curve associated to the principal congruence subgroup of level p(n), where p(n) is the n-th prime number.at n=34A191590
• Number of arrays of 5 integers in -n..n with sum zero and equal numbers of elements greater than zero and less than zero.at n=18A201813
• a(n) = (n + 1)*(2*n + 1)*(4*n + 9)/3.at n=36A269342
• Number of Dyck paths of semilength n such that all positive levels have the same number of peaks.at n=17A287987