Positions of 2 in sequence A217916.

Terms

a(0) =1a(1) =4a(2) =11a(3) =29a(4) =46a(5) =121a(6) =172a(7) =191a(8) =254a(9) =1276a(10) =1432a(11) =1654a(12) =2416a(13) =2486a(14) =5254a(15) =9181a(16) =9592a(17) =10012a(18) =10441a(19) =11629a(20) =12881a(21) =14029a(22) =14197a(23) =16472a(24) =20707a(25) =22367a(26) =23872a(27) =24532a(28) =24977a(29) =26336