Numbers k such that sopf(k) + 1 = sopf(k+1), where sopf(k) = A008472(k).

Terms

a(0) =2a(1) =8a(2) =120a(3) =168a(4) =175a(5) =247a(6) =860a(7) =1044a(8) =1444a(9) =1659a(10) =1849a(11) =3626a(12) =3834a(13) =4233a(14) =4300a(15) =4345a(16) =4814a(17) =6867a(18) =8240a(19) =14905a(20) =23287a(21) =24476a(22) =28919a(23) =29087a(24) =29464a(25) =30457a(26) =30650a(27) =33725a(28) =34945a(29) =35585