spt(5n+4) where spt(n) = A092269(n).

Terms

a(0) =10a(1) =80a(2) =440a(3) =1820a(4) =6545a(5) =20630a(6) =59960a(7) =161840a(8) =412950a(9) =1002435a(10) =2335760a(11) =5246120a(12) =11416820a(13) =24146510a(14) =49795175a(15) =100348950a(16) =198063060a(17) =383516700a(18) =729726660a(19) =1366124700a(20) =2519441030a(21) =4581865140a(22) =8224627160a(23) =14584074770a(24) =25565740130a(25) =44334556890a(26) =76102268520