48236domain: NAppears in sequencesa(n) = 3*a(n-1) - 4*a(n-3) + a(n-6).at n=12A019493Structured heptagonal diamond numbers (vertex structure 5).at n=30A100179Number of partitions p of n such that (number of numbers in p of form 3k+1) > (number of numbers in p of form 3k+2).at n=46A241739