26477

Appears in sequences

• Number of lambda calculus terms of size n, where size(lambda x.M) = 2 + size(M), size(M N) = 2 + size(M) + size(N), and size(V) = 1 + i for a variable V bound by the i-th enclosing lambda (corresponding to a binary encoding).at n=22A114851
• Number of unimodal compositions of n+2 where the maximal part appears exactly twice.at n=28A114921
• Number of doubletons in all partitions of n. By a doubleton in a partition we mean an occurrence of a part exactly twice (the partition [4,(3,3),2,2,2,(1,1)] has two doubletons, shown between parentheses).at n=39A116646
• Row sums from A144562.at n=28A144640
• Number of 0..n arrays of length 6 with each element differing from at least one neighbor by 2 or more, starting with 0.at n=7A221517
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-1)*b(n), where a(0) = 2, a(1) = 3, b(0) = 1, b(1) = 4, b(2) = 5, and (a(n)) and (b(n)) are increasing complementary sequences.at n=14A296275