Numbers k such that k and k+1 are both terms in A377210.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =12a(6) =47375a(7) =2310399a(8) =3525200a(9) =6506367a(10) =9388224a(11) =17613504a(12) =29373839a(13) =41534800a(14) =48191759a(15) =48344120a(16) =66927384a(17) =68094999a(18) =71982999a(19) =92547279a(20) =95497919a(21) =110146959a(22) =110395439a(23) =126123920a(24) =148865535a(25) =152546030a(26) =154451583a(27) =171570069a(28) =193628799a(29) =232058519