21502

Appears in sequences

• Let Do(n) = A006566(n) = n-th dodecahedral number. Consider all integer triples (i,j,k), j >= k > 0, with Do(i) = Do(j) + Do(k), ordered by increasing i; sequence gives k values.at n=11A053019
• Numbers n such that T(n) + T(n+1) + ... + T(n+26) is a square, where T = A000217 (triangular numbers).at n=18A257709
• Number of integer partitions of n whose unsigned differences have the same GCD as the GCD of their parts all minus 1.at n=37A328164
• Index in A375564 where n-th group of successive primes ends.at n=12A376196