33019
domain: N
Appears in sequences
- Number of matrix bundles of codimension n (Euler transform of A001156).at n=24A007864
- Ruth-Aaron numbers (2): sum of prime divisors of n = sum of prime divisors of n+1 (both taken with multiplicity).at n=32A039752
- Triangle of D-analogs of Stirling numbers of first kind.at n=31A039762
- Triangle of D-analogs of Stirling numbers of first kind, rows reversed.at n=32A039763
- Numbers k such that sopf(k) = sopfr(k+1), where sopf(k) = A008472(k) and sopfr(k) = A001414(k).at n=33A064678
- Total number of parts that are the smallest part or the largest part in all partitions of n.at n=29A182978
- Number of subsets of {1, 2, ..., n} containing n and having <=9 pairwise coprime elements.at n=44A186993
- G.f.: Sum_{n>=0} x^(n*(n+1)/2) / Product_{k=1..n} (1 - (n-k+1)*x^k).at n=15A204855
- Infinitary Ruth-Aaron numbers: numbers k such that A181894(k) = A181894(k+1).at n=23A330999
- Unitary Ruth-Aaron numbers: numbers k such that A008475(k) = A008475(k+1).at n=22A331000