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A346489 a(n) is the index of the smallest prime whose digits sum to n-th prime. 0
1, 2, 3, 4, 10, 19, 24, 46, 109, 430, 669, 3245, 6057, 7837, 33067, 77777, 476643, 601855, 3556550, 5216954, 15739663, 41146179, 189961757, 882206624, 3325059246, 15581005618, 23007498153, 37607875618 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..28.

FORMULA

a(n) = A000720(A054750(n)).

a(n) = min {k : A007605(k) = prime(n)}.

EXAMPLE

a(10) = 430 because prime(430) = 2999, 2 + 9 + 9 + 9 = 29 = prime(10) and this is the smallest such number.

CROSSREFS

Cf. A000040, A000720, A007605, A028834, A046704, A046864, A054750, A075177.

Sequence in context: A049891 A135432 A108364 * A145028 A306107 A229545

Adjacent sequences:  A346486 A346487 A346488 * A346490 A346491 A346492

KEYWORD

nonn,base

AUTHOR

Ilya Gutkovskiy, Jul 19 2021

STATUS

approved

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Last modified October 26 02:14 EDT 2021. Contains 348256 sequences. (Running on oeis4.)