87081

Appears in sequences

• a(0) = 0, a(1) = 1; for n > 1, a(n) = a(n-2) + a(n-1) + A000071(n+1).at n=19A140992
• Keith sequence for the number 197.at n=17A186830
• Number of (n+6)X8 0..1 matrices with each 7X7 subblock idempotent.at n=12A224582
• Numbers k for which the sum of digits of sigma(k) = the product of digits of sigma(k).at n=31A277217
• Regular triangle where T(n,k) is the number of non-isomorphic multiset partitions of k-element multiset partitions of multisets of size n.at n=50A330473