81601
domain: N
Appears in sequences
- Strong pseudoprimes to base 63.at n=34A020289
- a(n) = Sum_{i=0..n} digsum(i)^4, where digsum(i) = A007953(i).at n=32A231689
- a(n) = (1 + Sum_{j=1..K-1} a(n-j) + a(n-1)*a(n-K+1))/a(n-K) with a(1),...,a(K)=1, where K=4.at n=12A283329
- a(0) = a(1) = a(2) = 1, for n > 2, a(n) = a(n-1) + a(n-k) + k with k = 2.at n=28A362255