42531

Appears in sequences

• a(n) = numerator of polynomial of genus 1 and level n for m = 6 = A[1,n](6).at n=5A145664
• a(n) = number of n-lettered words in the alphabet {1, 2, 3} with as many occurrences of the substring (consecutive subword) [1, 1] as of [2, 2].at n=11A211277
• Sum over all partitions of n of the number of distinct parts i of multiplicity i+1.at n=48A276434
• G.f.: Product_{k>=1} (1 + x^(k*(k+1)/2)) / (1 - x^k).at n=33A280421