A134728 Concatenation of next n perfect numbers.

6, 28496, 8128335503368589869056, 13743869132823058430081399521282658455991569831744654692615953842176191561942608236107294793378084303638130997321548169216

Offset

1,1

Comments

The next term -- a(5) -- has 1592 digits. - Harvey P. Dale, Apr 04 2022

Links

Table of n, a(n) for n=1..4.

Omar E. Pol, Determinacion geometrica de los numeros primos y perfectos.

Mathematica

Module[{nn=5}, FromDigits[Flatten[IntegerDigits/@#]]&/@TakeList[ PerfectNumber[ Range[ (nn(nn+1))/2]], Range[nn]]] (* Harvey P. Dale, Apr 04 2022 *)

Crossrefs

Cf. A053067, A132928, A133013. Perfect numbers: A000396.

Sequence in context: A159429 A367944 A283888 * A127488 A294322 A274058

Adjacent sequences: A134725 A134726 A134727 * A134729 A134730 A134731

Keyword

base,easy,nonn

Author

Omar E. Pol, Nov 12 2007

Status

approved