158712

Appears in sequences

• Let Oc(n) = A005900(n) = n-th octahedral number. Consider all integer triples (i,j,k), j >= k > 0, with Oc(i) = Oc(j)+Oc(k), ordered by increasing i; sequence gives k values.at n=9A053678
• Numbers n such that n=d_1!!^2+d_2!!^2+...+d_k!!^2 where d_1d_2...d_k is the decimal expansion of n.at n=2A139409
• Number of binary strings of length n with equal numbers of 00011 and 11000 substrings.at n=18A164233
• Number of set partitions of [n] such that the difference between each element and its index (in the partition) is a multiple of five.at n=18A274862