354051

Appears in sequences

• Square of infinite lower triangular matrix A078122.at n=33A078123
• Pentagonal numbers > 0 which are not the difference of two other pentagonal numbers > 0.at n=24A135769
• Pentagonal numbers > 0 which are not the difference of two larger pentagonal numbers.at n=36A136113
• a(n) = A255304(2^n-1).at n=11A255442
• Pentagonal numbers (A000326) that are the sum of six consecutive pentagonal numbers.at n=1A257715
• Expansion of e.g.f. log(1-x)^2 * exp(-x) / 2.at n=10A381064